Improvement in mechanical movements



J. VAN`NETTE.

Mechancal-Movements- No.148,00 8, Patemed Feb24,1874.

WITNESSES INVEJVIOR Y f .dttorneg/s.

NITED STATES PATENT OFFICE JASPER VANNETTE, OF FOSTORIA, OHIO.

IMPROVEMENT IN MECHANICAL MOVEMENTS.

Specification forming part of Letters Patent No. 148,038, dated February24, 1874; application filed August 1e, 1873.

To all whom it may concern:

Be it known that I, J nsrEn VANNETTE, of Fostoria, in the county ofSeneca and in the State of Ohio, have invented certain new and usefulImprovements in Harvesters; and do herebyV declare that the following isa full, clear, and exact description thereof, reference being had to theaccompanying drawings and to the letters of reference marked thereon,making `a part of this specification.

My invention relates to that class of mechanical movements in which thecutter-bar of a harvester is operated bymeans of a revolving wheelhaving a cam or zigzag groove around its periphery; and the nature of myinvention consists in two levers, the one fulcrumed on the other, and soarranged that one enrl of each works in the cam-groove on the wheel atthe same time, and always in the opposite direction, and the lower endof the lever, which has a movable fulcrnm, being connected with thecutter-bar, all as will be hereinafter more fully set forth.

In order to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-Figure l is a side elevation, and Fig. 2 a front view, of my invention.

A represents a lever, which is hinged at its lower end to the frame-workof the machine. At the upper end of this lever is a spindle, on which isplaced a metal roller, a., and this roller works in the cam-groove bupon thewheel B. D represents another lever, which is pivoted orfulcrumed at m to the outer or front side of the inner lever A, andhence the fulcrum of said outer lever D is carried back and forth,according to the motion of the lever A as it is being driven by thecam-groove b in the wheel B. At the upper end of the lever D is aspindle, upon which is placed a roller, 1, also working in thecam-groove b of the wheel B.. The lengths of the upper parts of thelevers A and B, Jfrom the fulcrum are so adjusted that the rollers a.and d will be exactly one-half of a cam apart, the grooveb being formedby means of two series of alternating cams, as shown in Fig. 2, andhence the levers A andD are at all times driven in opposite directions.The lower end of the lever D is, by a rod, f, or its equivalent,connected with the heel of the cutter-bar C ofthe machine.

By this arrangement of the levers A and D and cam-wheel B, the necessarymotion to out grass or grain is obtained without using Aan abrupt cam,or the disadvantage of a single lever. The strain and wear of the partsworking` in the cam-groove are divided, thus increasing the durability.There is no lateral strain on the axle by the cam-wheel, as the levers,striking on the opposite sides of the cams, tend only to burst the cam,and not to move the Wheel on the axle.

Having thus fully described my invention,

`what I claim as new, and desire to secure by Letters Patent, is-

The combination, with the cam-wheel B, of the lever A, hinged or pivotedat its low-er end to the frame of the machine,and the lever D, connectedto the cutter-bar and pivoted to the lever A, the upper ends of bothlevers provided with friction points or rollers, and workin g inopposite directions in the cam-wheel, all substantially as and for thepurposes herein set forth.

In testimony that I claim the foregoing I have hereunto set my hand this2d day of Au-

